Window-latch.



PATENTED AUG. 9, 1904.

O. G. CALL.

WINDOW LATGH.

APPLIOATION FILED nmmso. 1903.

N0 MODEL.

UNiTEn STATES Patented August 9, 1904.

OLIVER U. CALL, OF SPRTNGFIELD, lVlASSAGl-IUSETTS.

WlNDOW-LATGH.

SPECIFICATION forming part of Letters Patent No. 767,136, dated August 9, 1904.

Application filed December 30, 1903, Serial No. 187,092. (No model.)

To all, Ll/72107721 it may concern.-

Be it known that I, OLIVER (J. CALL, a citizen of the United States of America, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in l/Vind0w-Latches, of which the following is a specification.

This invention relates to window-catches, the object thereof being to provide a catch whereby the window may be locked in a closed. position or may be supported in a more or less elevated position, a further object being to provide means associated with the catch, whereby if the window is left unlocked an attempt to open it will release the catch and lock the window before the latter has been raised a suilicient distance to permit an entrance to be effected, the construction being such, however, that from the inside the lower sash may be raised as far as desired.

In the drawings accompanying this application, Figure 1 is a perspective View of a portion of the upper and lower sash of a window having the invention applied thereto, the sash being closed. Fig. 2 a sectional elevation of the same, showing the sash in open position. Fig. 3 is a plan view of the under side of the catch, the bottom plate being removed, showing the bolt of the catch shot outwardly. Fig. 4 is a similar view showing the bolt retracted. Fig. 5 is a transverse section through the catch on line 5 5, Fig. 3.

Referring to these drawings, (0 indicates the upper sash, and Z) the lower. On the lower end of the upper sash and on the inside thereof is located a plate 0, having openings (Z cut therein to receive the end of the bolt (1 of a locking device, the casing of which is indicated by f. As shown in Fig. 2, the upper border of the openings (Z is made at right angles to the plate a and the lower border is beveled. The end of the bolt 0 is beveled, to the end that when the bolt is in engagement with one of the holes in the plate 0 the window may be lowered, but cannot be raised, provided the bolt is free to move. Extend ing at right angles to the bolt is an arm 9 thereon, having a curved edge or border against which a dog it on a spindle may bear to retract the bolt when the spindle is rotated, said retraction taking place against a spring j.

The elements above described are old in latch construction, and the essential features of my invention are embodied in certain devices associated with the above-described elements to accomplish the object of the invention, as hereinbefore set forth. The casingf is secured on the upper end of the lower sash (as shown in Fig. l) in such position that when the window is raised the bolt 0 may enter any one of the openings (Z cut in the plate a, se cured on the side of the upper sash a, and when the parts are in this position the lower sash cannot be raised nor can the upper one be lowered more than a distance equal to the opening below. By rotating the spindle *1; the belt a may be withdrawn by reason of the con tact of the dog it with the curved border of the arm 9 on said bolt. As the spindle is 1'0- tated a second dog m thereon (which is located on the spindle '11 above the plane of the dog It) will after the latter has retracted the bolt come in contact with the inner curved border 0 of a locking-platep, which is slidable toward and from thebolt on the pins (1 into locking engagement with the bolt. The pins are shown in Figs. 3 and i in section and in elevation in Fig. 5 and are located in the bottom plate 1* of the casing.

The locking-plate is provided with a shoulder thereon contiguous to the bolt and adapted to engage with a notch s in the side of the bolt when the latter has been retracted by the rotation of the spindle 2', the locking engagement of said plate 12 with the bolt being shown in Fig. 4, in which figure the parts are inthe position they wouldoecupy after the spindle has completed one revolution, and this operation will leave the dog it in the position relative to the portion 2? of the locking-plate shown in said figure, and a continued movement of the spindle would cause the dog it, acting against the rounded end of the arm t of the locking-plate, first to raise the rear end of said plate a little and then cam it away from the belt (1, thus eifecting the disengage ment thereof from said plate. Thus by the operation of the spindle the bolt 0 may be locked by the plate 19 and the latter be disengaged therefrom by the further rotation of said spindle.

It will be observed that on that part of the locking-plate next to the bolt is a depending arm a, which when the bolt is locked will lie alongside thereof and in contact therewith. It will also be observed that a hole is provided in the wall of the casing above the plate 1) to permit the extension therethrough of a tongue 9, which is located near and parallel with the border of the plate 0, and the latter, near the upper end thereof, is curved outwardly in the direction of said tongue 1;, as indicated at 0'. This curved-out portion of the border of the plate constitutes a cam-surface against which said tongue 1) may come in contact if the sash?) is raised (or the sash a lowered) and the locking-plate p thus be forced back out of engagement with the bolt 0, permitting the latter, actuated by its spring 7', to shoot into the last one of the openings (Z in the plate 0. Thus it is seen that should the bolt be inadvertently drawn back and locked in that position by the plate 1) any attempt to raise the lower sash or to lower the upper sash will effect the release of the bolt and permit it to engage with one of the openings in the plate 0 before the window can be opened far enough to permit entrance to be effected thereby. -Furthermore, it is to be observed that the location of the locking clevice at the top of the lower sash will make it impossible for anybody to reach through with the arm and operate it by hand.

The end of the arm it above referred to serves as a fulcrum for the locking-plate when the tongue 3) thereof comes in contact with the cam-surface 0. Said locking-plate is mounted loosely on the pins q, to the end that it may not only slide thereon toward and from the bolt 6, but, as shown in Fig. 4, may be slightly tilted by its engagementwith the bolt, thereby permitting a certain freedom of action which is desirable in constructions of this kind.

It will be observed that the arm t of the locking-platep is located in'a lower plane than that of the arm n and that the dogs 71 and m arelocated, respectively, in the planes of these arms. Furthermore, it is to be noted that the 7 arm 9 on the bolt is in the same plane as the arm t of the locking-bolt, and'that therefore the dog it will operate both in the course of its revolution, whereas the dog m operates only to throw the locking-plate into engagement with the bolt at the proper time following the retraction of the bolt. Now if it is desired to raise the lower sash or to drop the upper sash the full length thereof the bolt 6 may be retracted by operating the thumbpiece w far enough to prevent its engagement in the holes (Z, but not so far as to allow the locking-plate to be thrown into engagement therewith, and in this manner the tongue will be prevented from engaging the cam-surface 0, and hence the locking device will pass beyond the border of the plate 0 while still in a more or less retracted position; but as soon as the window has been raised far enough the continued movement of the thumb-piece 20 will effect the locking of the bolt and the consequent movement of the tongue 19' into such position that when the window is again lowered the bolt 0 will be released by the contact of said tongue with the said cam-surface, and as the window is closed the bolt will be in position to engage any one of the holes g again.

Having thus described my invention, what I claim, and desire to secure byLetters Patent of the United States, is-

1. The combination with the upper and lower sash of a window, of a locking device on the lower sash, a bolt associated with said device, and a socketed vertically disposed plate on the upper sash in position to have the socket therein engaged by said bolt; together with a lock for said bolt to prevent its retraction, and means on said plate to release the bolt, by the movement of one sash relative to the other.

2. In combination, an upper and a lower window-sash, a socketed vertically-disposed plate on the upper sash, and a locking device on the lower sash comprising a bolt to engage sockets in said plate, a spindle and dog on the latter to operate the bolt, and mechanism in the locking device operated by the spindle, to lock the bolt in a retracted position, together with a cam-surface on said plate located in the path of movement of a part of the locking device, to release the bolt when the two sashes attain a certain relative position.

OLIVER C. CALL. WVitnesses 'WM. H. CHAPIN, K. I. GLEMoNs. 

